名词
中文翻译：主电路
同义词：
['main circuit', 'primary circuit']
例句：
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1.The main circuit is responsible for powering the entire building.
主电路负责为整个建筑供电。
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2. The primary circuit was designed to handle high voltage and current.
主导电路被设计来处理高压和大电流。
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3.The circuit designer must ensure that all components are properly connected.
电路设计师必须确保所有组件都正确连接。